albuminoid vs ceratin

albuminoid and ceratin both are nouns.

Word	Noun	Adjective	Verb	Adverb
albuminoid	Yes	No	No	No
ceratin	Yes	No	No	No

As nouns, ceratin is a hyponym of albuminoid; that is, ceratin is a word with a more specific, narrower meaning than albuminoid:

albuminoid: a simple protein found in horny and cartilaginous tissues and in the lens of the eye
ceratin: a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves

Other hyponyms of albuminoid include collagen, elastin, gelatin, gelatine, chondrin, keratin.

albuminoid (noun)	ceratin (noun)
a simple protein found in horny and cartilaginous tissues and in the lens of the eye	a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves